Fault processing method based on storage battery online bypass system and related device

Abstract

The invention relates to the technical field of data processing, and discloses a fault processing method and related device based on a storage battery online bypass system, and the method comprises the steps: obtaining a voltage related information set and a charging and discharging current related information set of a storage battery pack; constructing a storage battery online bypass system according to the voltage related information set and the charging and discharging current related information set; performing real-time fault monitoring on the storage battery pack to obtain fault monitoring information; and under the condition that the fault monitoring information meets a preset fault condition, performing fault processing based on the storage battery online bypass system to obtain a target fault processing result. By implementing the method provided by the invention, storage battery fault processing can be carried out more quickly and more conveniently, and the operation reliability and the operation safety of the storage battery pack can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a fault processing method based on a battery online bypass system and a related device. Background Art

[0002] In the power industry, the DC system undertakes the key task of supplying stable and reliable power to the protection and automation secondary systems. As an important energy storage unit of the DC system, the stability of the battery's performance is directly related to the power supply reliability of the entire system. With the operation of the power system, the problem of battery failure has gradually become prominent. Common forms of failure are increased internal resistance and open circuit. However, the traditional way of dealing with battery failure has many disadvantages. After the battery abnormality is discovered, a series of cumbersome processes must be followed. First, the defect must be reported and the operation plan must be reported. Then, the entire battery group must be isolated through operations. Only after obtaining a work permit can the battery replacement work be carried out. This not only consumes a lot of manpower and time costs, but also during the entire process, if the AC system suddenly fails, since the entire battery group has been isolated, it is very likely to cause the DC system to lose power, which undoubtedly brings huge risks to the safe and stable operation of the power system. Summary of the invention

[0003] The present invention provides a fault handling method and related devices based on a battery online bypass system to solve the technical problem of how to handle battery faults more quickly and conveniently, and can effectively improve the operating reliability and operational safety of a battery pack.

[0004] In a first aspect, a fault handling method based on a battery online bypass system is provided, comprising:

[0005] Obtaining a set of information related to voltage and a set of information related to charge and discharge current of a battery pack;

[0006] Constructing a battery online bypass system based on a set of voltage related information and a set of charge and discharge current related information;

[0007] Conduct real-time fault monitoring of the battery pack to obtain fault monitoring information;

[0008] When the fault monitoring information meets the preset fault conditions, fault processing is performed based on the battery online bypass system to obtain the target fault processing result.

[0009] In a second aspect, a fault handling device based on a battery online bypass system is provided, comprising:

[0010] An acquisition module, used to acquire a set of information related to voltage and a set of information related to charge and discharge current of a battery pack;

[0011] A first processing module, used for constructing a battery online bypass system according to a voltage related information set and a charge and discharge current related information set;

[0012] The second processing module is used to perform real-time fault monitoring on the battery pack to obtain fault monitoring information;

[0013] The third processing module is used to perform fault processing based on the battery online bypass system to obtain a target fault processing result when the fault monitoring information meets the preset fault condition.

[0014] In a third aspect, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned fault handling method based on the battery online bypass system when executing the computer program.

[0015] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned fault handling method based on the battery online bypass system are implemented.

[0016] In the scheme implemented by the above-mentioned fault handling method and related devices based on the battery online bypass system, a set of voltage-related information and a set of charge and discharge current-related information of the battery group are obtained to construct a battery online bypass system based on the voltage-related information set and the charge and discharge current-related information set, and further real-time fault monitoring of the battery group is performed to obtain fault monitoring information, so that when the fault monitoring information meets the preset fault conditions, fault handling can be performed based on the battery online bypass system to obtain the target fault handling result, and the battery online bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault handling, avoids the faulty battery from running for a long time in the battery group, and improves the operating reliability and operational safety of the battery group. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of an application environment of a fault handling method based on a battery online bypass system in one embodiment of the present invention;

[0019] Figure 2It is a flow chart of a fault handling method based on a battery online bypass system in one embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a battery online bypass system in one embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a fault handling device based on a battery online bypass system in one embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of a structure of a computer device in one embodiment of the present invention;

[0023] Figure 6 It is another structural schematic diagram of a computer device in one embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The fault handling method based on the battery online bypass system provided by the embodiment of the present invention can be applied in the following aspects: Figure 1In an application environment, the client communicates with the server through a network. Exemplarily, taking the scenario of battery fault processing as an example, the target user (such as R&D personnel or management personnel) can upload the voltage-related information set and the charge-discharge current-related information set of the battery group through the client. Accordingly, the server can obtain the voltage-related information set and the charge-discharge current-related information set of the battery group through the client, so as to build a battery online bypass system based on the voltage-related information set and the charge-discharge current-related information set, and further perform real-time fault monitoring on the battery group to obtain fault monitoring information, so that when the fault monitoring information meets the preset fault condition, the fault processing can be performed based on the battery online bypass system to obtain the target fault processing result, and the target fault processing result is fed back to the client. Accordingly, the client can receive the target fault processing result from the server, and can display the target fault processing result on the client for the target user to query or browse. By adopting the fault handling method based on the battery online bypass system provided in the present application, the battery online bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault handling, avoids the long-term operation of faulty batteries in the battery pack, and improves the operating reliability and operational safety of the battery pack.

[0026] The client may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, and portable wearable devices. The server may be implemented by an independent server or a server cluster consisting of multiple servers. The present invention is described in detail below through specific embodiments.

[0027] See also Figure 2 As shown, Figure 2 A flowchart of a fault handling method based on a battery online bypass system provided in an embodiment of the present invention includes the following steps:

[0028] S10: Obtaining a set of information related to the voltage of the battery pack and a set of information related to the charge and discharge current.

[0029] The battery pack may include one or more batteries. The voltage-related information set may include one or more voltage-related information, which may be used to indicate various information related to the battery pack voltage, such as the rated voltage of the battery pack, the voltage range of each single battery, and the voltage change of the battery pack in different working states (such as charging, discharging, and standing, etc.), and the present application does not limit this.

[0030] The charge and discharge current related information set may include one or more charge and discharge current related information, which can be used to indicate various information related to the battery pack current, such as the rated charge and discharge current of the battery pack, the current change curve during the charging process, the current change curve during the discharging process, and the maximum current peak information that may occur under abnormal conditions (such as short circuit, overcharging and over-discharging, etc.), etc. This application does not impose any restrictions on this.

[0031] By collecting information related to the voltage of the battery pack (such as the voltage value of each single battery, the overall voltage range of the battery pack, etc.) and information related to the charge and discharge current (such as the charge and discharge current size and peak current during normal operation), the basic electrical characteristics of the battery pack can be fully understood, thereby providing key data basis for the subsequent construction of an adaptive battery online bypass system.

[0032] For example, when it is determined that the voltage level of the battery pack is high, then when building the bypass system, it is necessary to adjust the number of series diodes in the forward series diode group and the reverse series diode group accordingly to meet the normal operation and protection requirements under different voltages; similarly, the number of parallel diode groups can be determined according to the size of the charging and discharging current to ensure that the bypass system can carry the corresponding current and meet the DC system requirements. This application does not impose any restrictions on this.

[0033] S20: constructing a battery online bypass system according to the voltage-related information set and the charge-discharge current-related information set.

[0034] According to the determined voltage and current related parameters, the number of diodes, connection method, etc. can be reasonably selected to build a battery online bypass system that meets the actual application scenario. For example, if the battery pack voltage is high and the charge and discharge current is large, a large number of diodes can be used in series-parallel combination, so that the constructed bypass system can not only have no adverse effects on the battery under normal circumstances (such as avoiding the battery being bypassed during normal operation or reverse breakdown during charging), but also quickly and reliably play the bypass role when a fault occurs, so as to achieve stable and safe operation of the entire system.

[0035] It should be understood that the construction of the battery online bypass system according to the voltage related information set and the charge and discharge current related information set refers to the process of how to construct the battery online bypass system. Wherein, step S20, that is, the construction of the battery online bypass system according to the voltage related information set and the charge and discharge current related information set, includes the following steps:

[0036] S21: Determine the target number of diodes according to the voltage related information set;

[0037] S22: Determine the number of reference diode groups according to the charge and discharge current related information set;

[0038] S23: determining a target number of diode groups according to a preset reliability expectation and the reference number of diode groups;

[0039] S24: Determine the target diode model according to the target diode data and the target diode group number;

[0040] S25: assembling and obtaining a basic bypass unit according to the target diode model, the target diode number and the target diode group number;

[0041] S26: Perform system connection according to the basic bypass unit to obtain a battery online bypass system.

[0042] Among them, the target number of diodes can be used to indicate the number of diodes used to construct the diode group determined according to the voltage-related information of the battery pack (such as the rated voltage, the voltage range of the single battery, the voltage change under the working state, etc.). The service end can calculate the number of diodes required for the forward series diode group and the reverse series diode group according to the rated voltage of the battery pack. For example, if the battery voltage is high, more diodes may be required in series to ensure that the battery is not bypassed (for the forward series diode group) and is not reversely broken down during charging (for the reverse series diode group) during normal floating charge and equalization charge.

[0043] It should be understood that the determination of the target number of diodes according to the voltage-related information set refers to the process of how to determine the target number of diodes. In step S21, that is, determining the target number of diodes according to the voltage-related information set, includes the following steps:

[0044] S21: Acquire a rated voltage subset and a single battery voltage range subset from the voltage related information set;

[0045] S22: Analyze and obtain a forward working voltage condition and a reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset;

[0046] S23: Determine the number of forward series diodes according to the forward working voltage condition;

[0047] S24: Determine the number of reverse series diodes according to the reverse working voltage condition;

[0048] S25: Determine a target number of diodes according to the number of the forward series diodes and the number of the reverse series diodes.

[0049] The rated voltage subset may include one or more rated voltages of batteries, which may be used to indicate the standard operating voltage of the battery. The single battery voltage range subset may include one or more single battery voltage ranges, which may be used to indicate the standard voltage range corresponding to each battery when it is operating normally.

[0050] By obtaining the rated voltage subset, the voltage level that the bypass system needs to adapt to can be grasped as a whole; by obtaining the single battery voltage range subset, it can help to more carefully consider the working state of the diode when the single battery voltage changes, thereby avoiding triggering the bypass function within the normal voltage fluctuation range.

[0051] For the forward series diode group, it is necessary to ensure that the diode cannot be forward-conducted under the normal floating charge and equalization charge working state of the battery. This requires considering the maximum voltage of the battery group during normal operation and the forward conduction voltage characteristics of the diode. Generally speaking, the forward conduction voltage drop of a silicon diode is about 0.7V, and that of a germanium diode is about 0.3V. For example, in a battery group with a maximum floating charge voltage of 13.8V (assuming it is composed of 6 single lead-acid batteries, each with a maximum floating charge voltage of 2.3V), if a silicon diode is used, to ensure that the diode is not conductive at this voltage, the number of series diodes needs to be calculated based on this maximum voltage and the forward conduction voltage drop of the diode.

[0052] For the reverse series diode group, in order to prevent the reverse voltage from breaking through the diode during the battery charging process, it is necessary to clarify the maximum reverse voltage that may occur during charging, which may be related to the characteristics of the charging equipment, the charging method of the battery, etc. For example, some charging methods may generate a short reverse pulse voltage at the end of charging, and this voltage value is a key factor to be considered when designing the reverse series diode group.

[0053] It should be understood that, analyzing and obtaining the forward working voltage condition and the reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset refers to the process of how to analyze and obtain the forward working voltage condition and the reverse working voltage condition. Wherein, in step S22, that is, analyzing and obtaining the forward working voltage condition and the reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset, includes the following steps:

[0054] S221: Determine the highest forward voltage during normal operation according to the voltage range subset of the single battery;

[0055] S222: Determine a forward operating voltage condition according to the highest forward voltage;

[0056] S223: Determine a charging characteristic subset of the battery pack according to the rated voltage subset and the single battery voltage range subset;

[0057] S224: Determine a maximum reverse voltage during charging according to the charging characteristic subset;

[0058] S225: Determine a reverse operating voltage condition according to the highest reverse voltage.

[0059] The single cell voltage range subset may include the voltage fluctuation range of a single cell during normal operation. When determining the maximum forward voltage, the connection mode of the battery pack (series, parallel or series-parallel) may be considered; for a series battery pack, the maximum forward voltage is the maximum value in the single cell voltage range multiplied by the number of batteries; for a parallel battery pack, the maximum forward voltage is the maximum value in the single cell voltage range, so as to obtain the maximum value that the forward voltage of the battery pack may reach under normal working conditions.

[0060] Since there are voltage fluctuations in the actual working environment, such as power grid fluctuations, load changes and other factors, in order to ensure that the forward series diode group will not be turned on due to voltage fluctuations during normal operation, it is necessary to consider the actual voltage fluctuations on the basis of the maximum forward voltage, so as to obtain a forward working voltage condition that is more in line with the actual situation.

[0061] The rated voltage subset provides the basic voltage specifications of the battery pack, and the single battery voltage range subset can help understand the voltage changes of a single battery at different charging stages. By combining these two pieces of information, the characteristics of the battery pack during the charging process can be analyzed, such as the voltage change at the end of charging, whether a reverse voltage pulse will occur, etc., that is, the above charging characteristic subset is obtained.

[0062] Reverse voltage information that may occur during the charging process is obtained from the charging characteristic subset, such as the magnitude of the reverse pulse voltage generated by the charging device at the end of charging, the reverse voltage caused by the chemical reaction inside the battery under special circumstances, etc. Optionally, the maximum value of the above reverse voltages can be selected as the highest reverse voltage during charging.

[0063] Similar to determining the forward operating voltage condition, in order to prevent the reverse series diode group from being reversely broken down during the charging process, it is necessary to consider the actual voltage fluctuation based on the highest reverse voltage, so as to further obtain a reverse operating voltage condition that is more in line with the actual situation.

[0064] By analyzing and obtaining the forward working voltage conditions and reverse working voltage conditions, the required number of diodes can be accurately calculated based on the electrical characteristics of the diodes (forward conduction voltage drop and reverse withstand voltage), thereby ensuring that the bypass system will not malfunction during normal operation and ensuring that the battery can be effectively protected under abnormal voltage conditions.

[0065] Optionally, the maximum voltage of the battery pack during normal operation can be divided by the forward conduction voltage drop of the selected diode, and the preliminary number of the forward series diode group can be obtained by rounding up. For example, if the maximum voltage of the battery pack during normal operation is 48V, and a silicon diode (forward conduction voltage drop is 0.7V) is selected, the number of forward series diodes that can be preliminarily calculated is 48V÷0.7V≈68.57, which is rounded up to 69. This method can ensure that the diode will not conduct forward even at the highest voltage, avoiding the mistaken bypass of the normally operating battery.

[0066] Optionally, the maximum reverse voltage that may occur when the battery is charged can be divided by the reverse withstand voltage value of the selected diode, and the number of reverse series diode groups can be rounded up. Assuming that the maximum reverse voltage during charging is 100V and the reverse withstand voltage of the selected diode is 50V, the number of reverse series diodes is 100V÷50V=2. This method can ensure that when a reverse voltage occurs, the diode can withstand it without being broken down, thereby effectively protecting the charging safety of the battery pack.

[0067] In the actual operating environment, the voltage may fluctuate due to various factors (such as grid fluctuations, load changes, etc.). In order to ensure the reliability and safety of the diodes, a certain safety margin can be considered. Generally, based on experience or relevant standards, a certain proportion (such as 10%-20%) of diodes can be added to the number of diodes preliminarily calculated. For example, taking the previous calculation that 69 diodes are required for the forward series diode group as an example, considering a 10% safety margin, the final number of forward series diodes determined can be 69×(1+10%)≈76, and the final target number of diodes can be obtained, and this application does not impose any restrictions on this.

[0068] The reference diode group number may be a preliminary number of parallel forward series diode groups and reverse series diode groups calculated based on information related to the battery pack charge and discharge current (such as rated charge and discharge current, charge and discharge current change curve, current peak value under abnormal conditions, etc.). The main reference diode group number can satisfy the bypass system's ability to carry the battery pack's charge and discharge current under normal and abnormal conditions, and avoid diode damage due to excessive current.

[0069] The target number of diode groups can be the number of parallel groups of forward series diode groups and reverse series diode groups that is finally determined based on the reference number of diode groups and the preset reliability expectation (considering the system's requirements for reliability, such as fault tolerance, redundant design, etc.). The target number of diode groups can ensure that the bypass system has sufficient reliability in actual operation, and can still function normally even if some diodes fail.

[0070] Optionally, the service end can determine the number of parallel groups of forward and reverse series diode groups according to the charge and discharge current of the battery pack and the reliability expectations. For example, if the charge and discharge current is large or the system reliability requirements are extremely high, the number of parallel groups can be appropriately increased to ensure that the charge and discharge current of the battery pack can meet the DC system requirements.

[0071] The target diode model can be a specific diode model selected after comprehensively considering the target number of diodes (based on voltage requirements) and the target number of diode groups (based on current and reliability requirements). This type of diode can meet the requirements of the bypass system in terms of voltage, current carrying, switching characteristics, etc., and ensure that the bypass function can be correctly implemented under various working conditions.

[0072] The server can select appropriate diodes (such as VD11, VD12, VD21, VD22, etc.) according to the calculation results to assemble the forward series diode group and the reverse series diode group. Optionally, a conventional diode series-parallel method can be used, and a group of bidirectional conducting diodes or other diode series-parallel methods that meet the battery fast bypass function can also be considered, and this application does not limit this.

[0073] The forward series diode group and the reverse series diode group are connected in parallel to form a basic bypass unit. The basic bypass unit is mainly composed of the forward series diode group and the reverse series diode group connected in parallel, which is the core part of the complete battery online bypass system and can bypass the faulty battery.

[0074] By connecting the basic bypass unit to each battery in the battery pack in the correct way (positive and negative poles corresponding), a complete battery online bypass system can be further formed. Through the above connection, the bypass system can monitor the battery status in real time, and will not affect the charging and discharging of the battery when it is working normally, and automatically bypass the faulty battery when it fails.

[0075] For example, Figure 3 As shown, Figure 3 The schematic diagram of the structure of a battery online bypass system is shown as an example. It can be understood that Figure 3The battery online bypass system shown may include a basic bypass unit, which is not limited in the present application. Among them, terminal 1 may be connected to the positive electrode of the bypass battery, and terminal 2 may be connected to the negative electrode of the bypass battery.

[0076] like Figure 3 As shown, the battery fast bypass system can be composed of a forward series diode group VD11, VD12 and a reverse series diode group VD21, VD22 connected in parallel. The forward series diode group may include but not limited to two diodes VD11 and VD12. In practical applications, the number of series diodes can be adjusted according to the battery voltage to ensure that the battery is not bypassed during normal floating charge and equalization charge; the reverse series diode group may include but not limited to two diodes VD21 and VD22. In practical applications, the number of series diodes can be adjusted according to the battery voltage to ensure that the battery group is not reversely broken down during charging.

[0077] Optionally, the forward series diode group VD11, VD12 and the reverse series diode group VD21, VD22 are connected in parallel, including but not limited to two groups of forward and reverse series diodes in parallel. In actual applications, the number of parallel series diode groups is adjusted according to the battery pack charge and discharge current and reliability to ensure that the battery pack charge and discharge current meets the requirements of the DC system. Optionally, the forward series diode group VD11, VD12 and the reverse series diode group VD21, VD22 are connected in parallel, and can be replaced by a group of bidirectional conducting diodes or other diode groups in series and parallel. The diode series and parallel connection method that satisfies the battery rapid bypass is also within the protection scope of this application.

[0078] The battery fast bypass system is composed of diodes connected in series and parallel, aiming to improve the reliability of the battery pack in the simplest and most reliable passive way. When the battery pack is newly installed or technically modified, the battery fast bypass system is connected in parallel to each battery with a connecting wire. The bypass system is in the cut-off state during normal operation of the battery. When the internal resistance of the battery is high or the circuit is open, the voltage at both ends of the battery increases, and the battery fast bypass system is turned on, forming an automatic bypass function of the battery pack.

[0079] In the case where the battery rapid bypass system is not installed when the battery pack is newly installed or technically modified, when a battery abnormality is found and needs to be isolated, the battery rapid bypass system can be connected in parallel to the abnormal battery through the quick connection port to complete the abnormal battery bypass connection, and the abnormal battery can be replaced quickly online with power.

[0080] S30: Perform real-time fault monitoring on the battery pack to obtain fault monitoring information.

[0081] After the battery pack is put into use, it is essential to continuously monitor it in real time. Through various monitoring methods (such as installing online monitoring sensors to detect the internal resistance and voltage changes of each battery), relevant data is collected as a basis for judging whether the battery has a fault and forming fault monitoring information. For example, when the internal resistance of a battery continues to increase beyond the normal range, or its voltage fluctuates abnormally, this information will be monitored and recorded for subsequent comparison and judgment with the preset fault conditions.

[0082] It should be understood that performing real-time fault monitoring on the battery pack to obtain fault monitoring information refers to the process of how to obtain the fault monitoring information. In step S30, that is, performing real-time fault monitoring on the battery pack to obtain the fault monitoring information, includes the following steps:

[0083] S31: monitoring the internal resistance of the battery pack to obtain internal resistance fault information;

[0084] S32: monitoring the voltage of the battery pack to obtain voltage fault information;

[0085] S33: monitoring the temperature of the battery pack to obtain temperature fault information;

[0086] S34: monitoring the charge and discharge current of the battery pack to obtain charge and discharge current fault information;

[0087] S35: Determine fault monitoring information according to the internal resistance fault information, the voltage fault information, the temperature fault information and the charge and discharge current fault information.

[0088] The internal resistance of a battery can reflect the health of the battery. As the battery is used, problems such as plate sulfation and active material shedding will cause the internal resistance to increase. By connecting an internal resistance tester to the internal battery pack circuit, or using a battery management system (BMS) with an internal resistance monitoring function, the internal resistance of each battery can be measured in real time. For example, for a lead-acid battery, the internal resistance may be between a few milliohms and tens of milliohms under normal circumstances.

[0089] Optionally, the frequency of internal resistance monitoring can be determined based on factors such as the importance of the battery and the use environment. For example, in a critical power system DC battery pack, internal resistance measurement may be performed every few minutes; while for some occasions with slightly lower requirements for power continuity, the monitoring frequency can be appropriately reduced, such as once an hour.

[0090] The voltage of the battery has a certain range during normal charging and discharging. Monitoring the voltage can timely detect battery overcharge, over discharge, short circuit or open circuit faults. Voltage data can be obtained by connecting a voltage sensor to the positive and negative terminals of the battery. Optionally, the battery voltage in critical systems can be monitored in real time, and a lower voltage monitoring frequency can be used for general systems, such as monitoring once every 10-15 minutes.

[0091] The battery generates heat during operation, and the temperature changes relatively steadily under normal circumstances. However, when a short circuit or other fault occurs inside the battery, the temperature will rise sharply. By installing a temperature sensor on the surface or inside the battery shell, the temperature change can be sensed in real time. Optionally, temperature monitoring can be performed simultaneously with voltage monitoring. For battery packs that are more sensitive to temperature changes, separate high-frequency monitoring can also be added, such as monitoring temperature changes once a second.

[0092] The size of the charging and discharging current of the battery reflects its working status. The current can be measured in real time by installing a current transformer or a Hall current sensor in the charging and discharging circuit. Abnormal current changes may mean problems such as changes in the internal resistance of the battery and external circuit failures. For example, during normal charging, the charging current should gradually decrease according to the set charging curve. If the current suddenly increases or decreases, it means that there may be a fault. Optionally, the monitoring frequency of the charging and discharging current can be determined according to the charging and discharging conditions of the battery. For example, real-time monitoring can be performed during the charging or discharging process, and the monitoring frequency can be appropriately reduced during the static stage. This application does not limit this.

[0093] The fault monitoring information may be a comprehensive data set composed of the above-mentioned various monitoring data, and the fault detection information may include the real-time internal resistance data, voltage data, temperature data and charge and discharge current data of each battery, and optionally, may also include the change trend information of the above-mentioned data, such as the growth rate of the internal resistance, the rate of decrease of the voltage, etc. For example, a complete fault monitoring information may be: battery 1 - internal resistance is 50 milliohms (increased by 5 milliohms compared with the last measurement), voltage is 2.1V (decreased by 0.1V compared with the last measurement), temperature is 30°C (increased by 2°C compared with the last measurement), and charging current is 1A (decreased by 0.2A compared with the last measurement), and this application does not limit this.

[0094] Optionally, the original monitoring data can be filtered and calibrated to remove noise interference, thereby ensuring the accuracy of the data. Then, the data processing algorithm is used to analyze the changing trends and abnormal conditions of the data. For example, the continuous internal resistance measurement data is processed by the moving average method to smooth the data fluctuations and more accurately determine whether the internal resistance has actually increased. When the monitoring data exceeds the pre-set normal range (such as the internal resistance exceeds the set threshold, the voltage is too high or too low, the temperature exceeds the normal range, the current changes abnormally, etc.), it is determined that a fault may occur, and the abnormal data and related information can constitute fault monitoring information for fault handling.

[0095] S40: When the fault monitoring information meets a preset fault condition, a fault process is performed based on the battery online bypass system to obtain a target fault process result.

[0096] The fault monitoring information acquired in real time is compared with the pre-set fault conditions (for example, the internal resistance of the battery exceeds a certain threshold, the voltage deviates from the normal range within a certain range, etc., and is judged as a fault). Once the preset fault conditions are met, the battery online bypass system is immediately started to handle the fault. The fault handling process can bypass the faulty battery to avoid affecting the normal power supply of the rest of the battery pack, and further operations such as live replacement of the faulty battery can be carried out, ultimately achieving the target fault handling result of maintaining the normal operation of the battery pack as a whole and improving the reliability of power supply, which is conducive to ensuring the stable and reliable power supply of the DC system.

[0097] It can be seen that in the above scheme, by obtaining a set of voltage-related information and a set of charge-discharge current-related information of the battery pack, a battery online bypass system is constructed according to the voltage-related information set and the charge-discharge current-related information set, and further real-time fault monitoring is performed on the battery pack to obtain fault monitoring information, so that when the fault monitoring information meets the preset fault conditions, fault processing can be performed based on the battery online bypass system to obtain the target fault processing result, and the battery online bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault processing, avoids the long-term operation of faulty batteries in the battery pack, and improves the operating reliability and operational safety of the battery pack.

[0098] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0099] In one embodiment, a fault handling device based on an online battery bypass system is provided, and the fault handling device based on an online battery bypass system corresponds one-to-one to the fault handling method based on an online battery bypass system in the above embodiment. Figure 4 As shown, the fault handling device based on the battery online bypass system includes an acquisition module 101, a first processing module 102, a second processing module 103 and a third processing module 104. The detailed description of each functional module is as follows:

[0100] An acquisition module 101 is used to acquire a set of voltage-related information and a set of charge and discharge current-related information of a battery pack;

[0101] A first processing module 102, configured to construct a battery online bypass system according to the voltage related information set and the charge and discharge current related information set;

[0102] The second processing module 103 is used to perform real-time fault monitoring on the battery pack to obtain fault monitoring information;

[0103] The third processing module 104 is used to perform fault processing based on the battery online bypass system to obtain a target fault processing result when the fault monitoring information meets a preset fault condition.

[0104] In one embodiment, the first processing module 102 is used to construct a battery online bypass system according to the voltage related information set and the charge and discharge current related information set, specifically for:

[0105] Determine the target number of diodes according to the voltage related information set;

[0106] Determine the number of reference diode groups according to the charge and discharge current related information set;

[0107] Determining a target number of diode groups according to a preset reliability expectation and the reference number of diode groups;

[0108] Determine the target diode model according to the target diode data and the target diode group number;

[0109] According to the target diode model, the target diode number and the target diode group number, assemble and obtain a basic bypass unit;

[0110] The system is connected according to the basic bypass unit to obtain a battery online bypass system.

[0111] In one embodiment, the first processing module 102 is used to determine the target number of diodes according to the voltage related information set, specifically to:

[0112] Acquire a rated voltage subset and a single battery voltage range subset from the voltage related information set;

[0113] Analyze and obtain a forward working voltage condition and a reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset;

[0114] According to the forward working voltage condition, determining the number of forward series diodes;

[0115] Determining the number of reverse series diodes according to the reverse operating voltage condition;

[0116] The target number of diodes is determined according to the number of the forward series diodes and the number of the reverse series diodes.

[0117] In one embodiment, the first processing module 102 is used to analyze and obtain the forward working voltage condition and the reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset, specifically for:

[0118] Determining a maximum forward voltage during normal operation according to the voltage range subset of the single battery;

[0119] Determining a forward operating voltage condition according to the highest forward voltage;

[0120] Determining a charging characteristic subset of a battery pack according to the rated voltage subset and the single battery voltage range subset;

[0121] Determining a maximum reverse voltage during charging according to the charging characteristic subset;

[0122] A reverse operating voltage condition is determined according to the highest reverse voltage.

[0123] In one embodiment, the second processing module 103 is used to perform real-time fault monitoring on the battery pack to obtain fault monitoring information, specifically for:

[0124] Performing internal resistance monitoring on the battery pack to obtain internal resistance fault information;

[0125] Performing voltage monitoring on the battery pack to obtain voltage fault information;

[0126] Performing temperature monitoring on the battery pack to obtain temperature fault information;

[0127] Monitoring the charge and discharge current of the battery pack to obtain charge and discharge current fault information;

[0128] Fault monitoring information is determined according to the internal resistance fault information, the voltage fault information, the temperature fault information and the charge and discharge current fault information.

[0129] The present invention provides a fault handling device based on an online battery bypass system. By acquiring a voltage-related information set and a charge-discharge current-related information set of a battery group, an online battery bypass system is constructed according to the voltage-related information set and the charge-discharge current-related information set, and further real-time fault monitoring is performed on the battery group to obtain fault monitoring information. Therefore, when the fault monitoring information meets a preset fault condition, fault handling is performed based on the online battery bypass system to obtain a target fault handling result. The online battery bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault handling, avoids long-term operation of faulty batteries in battery groups, and improves the operating reliability and operational safety of the battery group.

[0130] The specific definition of the fault handling device based on the battery online bypass system can be found in the definition of the fault handling method based on the battery online bypass system above, which will not be repeated here. Each module in the above-mentioned fault handling device based on the battery online bypass system can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0131] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile and / or volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external client via a network connection. When the computer program is executed by the processor, the functions or steps on the service side of a fault handling method based on a battery online bypass system are implemented.

[0132] In one embodiment, a computer device is provided. The computer device may be a client, and its internal structure diagram may be as follows: Figure 6As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server through a network connection. When the computer program is executed by the processor, the functions or steps of the client side of a fault handling method based on a battery online bypass system are implemented.

[0133] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program:

[0134] Obtaining a set of information related to voltage and a set of information related to charge and discharge current of a battery pack;

[0135] Constructing a battery online bypass system according to the voltage related information set and the charge and discharge current related information set;

[0136] Performing real-time fault monitoring on the battery pack to obtain fault monitoring information;

[0137] When the fault monitoring information meets a preset fault condition, fault processing is performed based on the battery online bypass system to obtain a target fault processing result.

[0138] The present invention provides a computer device, which acquires a voltage-related information set and a charge-discharge current-related information set of a battery pack, and constructs a battery online bypass system according to the voltage-related information set and the charge-discharge current-related information set, and further performs real-time fault monitoring on the battery pack to obtain fault monitoring information, so that when the fault monitoring information meets a preset fault condition, fault processing can be performed based on the battery online bypass system to obtain a target fault processing result, and the battery online bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault processing, avoids long-term operation of faulty batteries in the battery pack, and improves the operating reliability and operational safety of the battery pack.

[0139] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0140] Obtaining a set of information related to voltage and a set of information related to charge and discharge current of a battery pack;

[0141] Constructing a battery online bypass system according to the voltage related information set and the charge and discharge current related information set;

[0142] Performing real-time fault monitoring on the battery pack to obtain fault monitoring information;

[0143] When the fault monitoring information meets a preset fault condition, fault processing is performed based on the battery online bypass system to obtain a target fault processing result.

[0144] The present invention provides a computer-readable storage medium, which acquires a voltage-related information set and a charge-discharge current-related information set of a battery pack, and constructs a battery online bypass system according to the voltage-related information set and the charge-discharge current-related information set, and further performs real-time fault monitoring on the battery pack to obtain fault monitoring information, so that when the fault monitoring information meets a preset fault condition, fault processing can be performed based on the battery online bypass system to obtain a target fault processing result, and the battery online bypass system can be used to carry out rapid bypass and live replacement of faulty batteries, which is conducive to faster and more convenient battery fault processing, avoids long-term operation of faulty batteries in the battery pack, and improves the operating reliability and operational safety of the battery pack.

[0145] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or computer device can refer to the relevant descriptions on the server side and the client side in the aforementioned method embodiment. To avoid repetition, they will not be described one by one here.

[0146] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0147] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0148] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A fault handling method based on a battery online bypass system, characterized in that: The fault handling method based on the battery online bypass system includes: Obtaining a set of information related to voltage and a set of information related to charge and discharge current of a battery pack; Constructing a battery online bypass system according to the voltage related information set and the charge and discharge current related information set; Performing real-time fault monitoring on the battery pack to obtain fault monitoring information; When the fault monitoring information meets a preset fault condition, fault processing is performed based on the battery online bypass system to obtain a target fault processing result.

2. The fault handling method based on the battery online bypass system according to claim 1 is characterized in that: The step of constructing a battery online bypass system according to the voltage related information set and the charge and discharge current related information set includes: Determine the target number of diodes according to the voltage related information set; Determine the number of reference diode groups according to the charge and discharge current related information set; Determining a target number of diode groups according to a preset reliability expectation and the reference number of diode groups; Determine the target diode model according to the target diode data and the target diode group number; According to the target diode model, the target diode number and the target diode group number, assemble and obtain a basic bypass unit; The system is connected according to the basic bypass unit to obtain a battery online bypass system.

3. The fault handling method based on the battery online bypass system according to claim 2 is characterized in that: The determining the target number of diodes according to the voltage related information set includes: Acquire a rated voltage subset and a single battery voltage range subset from the voltage related information set; Analyze and obtain a forward working voltage condition and a reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset; According to the forward working voltage condition, determining the number of forward series diodes; Determining the number of reverse series diodes according to the reverse operating voltage condition; The target number of diodes is determined according to the number of the forward series diodes and the number of the reverse series diodes.

4. The fault handling method based on the battery online bypass system according to claim 3 is characterized in that: The step of analyzing and obtaining a forward working voltage condition and a reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset includes: Determining a maximum forward voltage during normal operation according to the voltage range subset of the single battery; Determining a forward operating voltage condition according to the highest forward voltage; Determining a charging characteristic subset of a battery pack according to the rated voltage subset and the single battery voltage range subset; Determining a maximum reverse voltage during charging according to the charging characteristic subset; A reverse operating voltage condition is determined according to the highest reverse voltage.

5. The fault handling method based on the battery online bypass system according to any one of claims 1 to 4, characterized in that: The real-time fault monitoring of the battery pack to obtain fault monitoring information includes: Performing internal resistance monitoring on the battery pack to obtain internal resistance fault information; Performing voltage monitoring on the battery pack to obtain voltage fault information; Performing temperature monitoring on the battery pack to obtain temperature fault information; Monitoring the charge and discharge current of the battery pack to obtain charge and discharge current fault information; Fault monitoring information is determined according to the internal resistance fault information, the voltage fault information, the temperature fault information and the charge and discharge current fault information.

6. A fault handling device based on a battery online bypass system, characterized in that: The fault handling device based on the battery online bypass system includes: An acquisition module, used to acquire a set of information related to voltage and a set of information related to charge and discharge current of a battery pack; A first processing module, configured to construct an online bypass system for a storage battery according to the voltage related information set and the charge and discharge current related information set; A second processing module is used to perform real-time fault monitoring on the battery pack to obtain fault monitoring information; The third processing module is used to perform fault processing based on the battery online bypass system to obtain a target fault processing result when the fault monitoring information meets a preset fault condition.

7. The fault handling device based on the battery online bypass system according to claim 6 is characterized in that: The first processing module is used to construct a battery online bypass system according to the voltage related information set and the charge and discharge current related information set, and is specifically used to: Determine the target number of diodes according to the voltage related information set; Determine the number of reference diode groups according to the charge and discharge current related information set; Determining a target number of diode groups according to a preset reliability expectation and the reference number of diode groups; Determine the target diode model according to the target diode data and the target diode group number; According to the target diode model, the target diode number and the target diode group number, assemble and obtain a basic bypass unit; The system is connected according to the basic bypass unit to obtain a battery online bypass system.

8. The fault handling device based on the battery online bypass system according to claim 7 is characterized in that: The first processing module is used to determine the target number of diodes according to the voltage related information set, specifically to: Acquire a rated voltage subset and a single battery voltage range subset from the voltage related information set; Analyze and obtain a forward working voltage condition and a reverse working voltage condition according to the rated voltage subset and the single battery voltage range subset; According to the forward working voltage condition, determining the number of forward series diodes; Determining the number of reverse series diodes according to the reverse operating voltage condition; The target number of diodes is determined according to the number of the forward series diodes and the number of the reverse series diodes.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the fault handling method based on the battery online bypass system according to any one of claims 1 to 5 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the fault handling method based on the battery online bypass system as described in any one of claims 1 to 5 is implemented.

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